alison, thanks for joining us. what with you tell us? >> reporter: don, major headaches for these passengers tonight. we were actually at terminal b covering the story with the stepped-up security efforts that are going into effect at midnight by the tsa, and we heard there was a lockdown in terminal c. so we jumped on the airtran and went over to see. really when you were at b you couldn't even tell there was anything wrong. but the minute we got off the airtran and we were at c, you could see the crowds. they were just building up. everything shut down, and there were a number of security officials who were telling people to go to the top floor and the bottom floor, and they were just trying to get everyone away from the terminal. and we spoke with one flight attendant. she was coming in on an international flight. and she said she was told no one was allowed on the airplane or off the airplane until customs officials were able to come on the airplane and check everything out. there were a number of worried people, a number of frighten